Steel R9M4K8-MP (ДИ102-MP)

Designation

Name	The value
Name	The value
Designation GOST Cyrillic	Р9М4К8-МП
Designation GOST Latin	P9M4K8-MP
Transliteration	R9M4K8-MP
By chemical elements	-

Name	The value
Name	The value
Designation GOST Cyrillic	ДИ102-МП
Designation GOST Latin	DI102-MP
Transliteration	DI102-MP
By chemical elements	CuИ102-MoP

Description

Steel R9M4K8-MP used: for the production of hot rolled and forged strips, hot rolled, forged and calibrated rods, rods with special surface finish produced by hot gas-static pressing (GGP) pulverized powder with subsequent deformation of the blanks; shaped cutters, drills, reamers, core drills, milling cutters (worm, terminal, disk, special), dalbekov, shaver for processing high-strength steels and heat resistant steels and alloys.

Standards

Name	Code	Standards
Name	Code	Standards
Bars and shapes	В22	GOST 1133-71, GOST 2590-2006, GOST 2591-2006
Sheets and strips	В33	GOST 4405-75
Bars and shapes	В32	GOST 7417-75, GOST 28393-89

Chemical composition

Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	V	Mo	W	O	Co
Standard	C	S	P	Mn	Cr	Si	Ni	Fe	Cu	N	V	Mo	W	O	Co
GOST 28393-89	1.1-1.2	≤0.03	≤0.03	≤0.5	3-3.6	≤0.6	≤0.4	Rest	≤0.25	0.02-0.06	2.3-2.7	3.8-4.3	8.5-9.5	≤0.02	7.5-8.5

Fe is the basis.

Technological properties

Name	The value
Name	The value
Sanding behaviour	Of 1.00 to 1.30 relative to steel of grade R6M5.
Wear resistance	tool life of 1.50-2.00 in comparison with steel R9M4K8. Tensile strength in bending MPa 3000-3700.